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3 years ago

8

When Tammy was 4, the ratio of Tammy's age to her father's age was 1:7. What will the ratio of their ages be when Tammy's dad is

48?

1 answer:

Nataly_w [17]3 years ago

3 0

To do this just multiply 4 by 7 to get the answer of 28. The ratio is 28:48.

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3 years ago

A woman earns $ 1,350 in interest from two accounts in one year. If she has three times as much invested at 7% as she does at 6%

VashaNatasha [74]

Answer:

The woman invested $15,000 at 7% interest rate and $5,000 at 6% interest rate.

Step-by-step explanation:

We are given the following in the question:

Let x be the interest earned from 7% interest rate and y be the interest earned from 6% interest rate.

The woman invested has three times as much invested at 7% as she does at 6%.

Thus, we can write the equation:

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The total interest is $1,350.

Thus, we can write the equation:

$1350 = \dfrac{7x}{100} + \dfrac{6y}{100}\\\\7x + 6y = 135000$

Solving the two equations by substitution method:

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Thus, she invested $15,000 at 7% interest rate and $5,000 at 6% interest rate.

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